As presidential contenders gather in Iowa for the beginning of the party selection season, they may have noticed a lot of wind turbines, writes Zachary Davies Boren. And if they have any sense, they will find only nice things to say about them. Wind supplies 30% of the state's power, more than any other US state, and Iowans are all for it. Ted Cruz, mind your words!

Today, there are 12 factories in Iowa that build wind-related parts and materials, and wind supports as many as 7,000 jobs. Furthermore, the steady long-term costs of wind power promise to keep Iowa's electricity prices stable for many years to come.

Republican governor Terry Branstad intends on hitting 40% by 2020. His spokesman has said: "Every turbine you see driving across the state of Iowa means three things. It means income for farmers, it means revenue for local governments, and it means jobs for Iowa families."